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S21 Vibrações e Análise Modal |
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Title:
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ON-LINE IDENTIFICATION OF HYSTERETIC SYSTEMS
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Summary :
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ABSTRACT. AN ADAPTIVE ESTIMATION APPROACH METHOD IS USED FOR THE ON LINE IDENTIFICATION OF HYSTERETIC SYSTEMS UNDER ARBITRARY DYNAMIC ENVIRONMENT. THE AVAILABILITY OF SUCH AN IDENTIFICATION APPROACH IS INDISPENSABLE FOR THE ON-LINE CONTROL AND MONITORING OF NONLINEAR STRUCTURAL SYSTEMS TO BE ACTIVELY CONTROLLED. THE HYSTERETIC RESTORING FORCE IS MODELED BY THE BOUC-WEN MODEL, AND THE ADAPTIVE LAW INSURES THAT ALL SIGNALS WILL REMAIN BOUNDED. THE MODEL IS MODIFIED TO PRODUCE A LINEARLY PARAMETERIZED ESTIMATOR, WHICH PERMITS THE ON-LINE PREDICTION OF THE HYSTERETIC BEHAVIOR THROUGH RECURSIVE TECHNIQUES.
THE IDENTIFICATION OF THE HEREDITARY NATURE OF THE RESTORING FORCE OF THIS NONLINEAR SYSTEM IS A SIGNIFICANT CHALLENGE. HOWEVER, IT IS SHOWN THROUGH THE USE OF SIMULATION STUDIES AND EXPERIMENTAL MEASUREMENTS THAT THE PROPOSED APPROACH CAN YIELD RELIABLE ESTIMATES OF THE HYSTERETIC RESTORING FORCE.
KEYWORDS: HYSTERETIC SYSTEMS, IDENTIFICATION, ADAPTIVE ESTIMATION
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Author :
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Castro, Jaime T.
El-Sharwy, Hani H.
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Paper View :
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